Section summary a fluid is a state of matter that yields to sideways or shearing forces. Liquids and gases are both fluids. Fluid statics is the physics of stationary fluids.

All liquids and gases are fluids. Fluid in physics, a fluid is a liquid, gas, or other material that may continuously move and deform (flow) under an applied shear stress, or external force. A situation that is fluid is unstable and is likely to change often. The situation is extremely fluid and it can be changing from day to day. A substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape. See examples of fluid used in รขโ‚ฌยฆ The meaning of fluid is having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure :

A substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape. See examples of fluid used in รขโ‚ฌยฆ The meaning of fluid is having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : Capable of flowing.